Chacko questioned BJP member Yashwant Sinha's letter to the Prime Minister asking him to appear before the committee in the light of former Telecom Minister A Raja's "serious allegations" against him.
A day after asking Singh to appear before the JPC to "clear" his name, Sinha alleged today that Raja was being prevented from deposing as it would lead to "serious trouble" for the Prime Minister and Finance Minister P Chidambaram.
Chacko said Sinha's letter has "no relevance" as decisions including calling a minister have to be taken by the committee and "not individuals."
When pointed out that Sinha has asked the Prime Minister to volunteer himself as a witness before JPC, Chacko said, "even if the Prime Minister wants he cannot appear before the JPC. That's the norm which applies to all of us."
Raja has been repeatedly requesting the JPC to call him for deposition. After being denied the opportunity, he wrote to the committee last month, saying the Prime Minister was in the loop over decisions taken regarding the controversial allocation of 2G spectrum in 2008.